A clean quantitative framing is this: volatility targeting is a sizing tool, not a free Sharpe upgrade. Mechanism: Most people hear "volatility targeting" and imagine a performance trick. In practice it is mostly a position-sizing rule that tries to keep portfolio risk from lurching around. That matters because unstable risk budgets usually create emotional decision-making long before they create return problems. Market translation: If a sleeve tied to $SPY doubles its realized volatility, the disciplined response is usually to cut exposure, not to rationalize the larger swings. $$ w_t = \frac{\sigma^{*}}{\hat{\sigma}_t} $$ Plain English: Target weight today is target volatility divided by estimated current volatility. Failure mode: The common mistake is treating lower realized drawdown as proof that the signal improved. Often the signal stayed the same and the leverage changed. Review question: Ask whether the market is mispricing the mechanism or simply narrating it loudly. That is usually where the edge is: not in the vocabulary, but in the structure underneath it.